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Appletons' Popular Science Monthly, December 1899
Various
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Appletons' Popular Science Monthly, February 1900
Various
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Appletons' Popular Science Monthly, October 1899
Various
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The Popular Science Monthly, September, 1900
Various
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Appletons' Popular Science Monthly, May, 1900
Various
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Appletons' Popular Science Monthly, June 1899
Various
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Appletons' Popular Science Monthly, August 1899
Various
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Appletons' Popular Science Monthly, January 1900
Various
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The Popular Science Monthly, August, 1900
Various
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Appletons' Popular Science Monthly, September 1899
Various
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The Popular Science Monthly, July, 1900
Various
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The Popular Science Monthly, June, 1900
Various
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Appletons' Popular Science Monthly, May 1899
Various
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Appletons' Popular Science Monthly, November 1899
Various
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